Summary of usability questionnaire responses.
|Usability question||Median rating and % of responses for each rating (1 through 5)|
|Overall comfort (1—very comfortable, 5—very uncomfortable) ||1 |
|Comfort in comparison with HFA (1—much better, 5—much worse)||2 |
|Were the test principles easy to understand? (1—easy, 5—difficult)||1 |
|Overall difficulty of test procedure (1—very easy, 5—very difficult) ||1 |
|Device preference (1—VirtualEye, 5—HFA)||2 |
|VirtualEye mode preference (1—manual, 5—visual grasp)||3 |